<template>
<div class="setBackgroundImage">
  <div class="login_container">
    <!--头像区域-->
    <div class="avator_box">
      <img src="../assets/logo.png" alt="" />
    </div>
    <!--登录表单区域-->
    <el-form
      ref="loginFormRef"
      :model="loginForm"
      :rules="loginFormRules"
      label-width="0px"
      class="login_form"
    >
      <!--用户名-->
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          prefix-icon="iconfont icon-users "
        ></el-input>
      </el-form-item>
      <!--密码-->
      <el-form-item prop="password">
        <el-input
          type="password"
          v-model="loginForm.password"
          prefix-icon="iconfont icon-lock-fill"
        ></el-input>
      </el-form-item>
      <!--按钮区-->
      <el-form-item class="btns">
        <el-button type="primary" @click="login">登录</el-button>
        <el-button type="info" @click="resetLoginForm">重置</el-button>
      </el-form-item>
    </el-form>
  </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //这是登录表单的数据绑定对象
      loginForm: {
        username: '',
        password: '',
      },
      //这是表单的验证规则对象
      loginFormRules: {
        username: [
          //验证用户名是否合法
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        password: [
          //验证密码是否合法
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 10,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    resetLoginForm() {
      //重置
      this.$refs.loginFormRef.resetFields()
    },

    login() {
      //登录前的验证
      this.$refs.loginFormRef.validate(async (valid) => {
        // console.log(valid);
        // valid=false,不发起请求，直接返回
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败！')
        this.$message.success('登陆成功！')
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
.setBackgroundImage {
  width: 100%;
  height: 100%;
  background-image: url('../assets/02.jpg');
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.login_container {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avator_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #eee;
    background-color: #fff;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .login_form {
    position: absolute;
    bottom: 0px;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>